MECOSTA COUNTY, MI - A Mount Pleasant man is accused of sexually assaulting a woman in Mecosta and Osceola counties throughout the course of a year.

Michigan State Police on Oct. 21 arrested Robert David Foster, 31, for third-degree criminal sexual conduct. He was arraigned the following day on the charge, police said.

Foster is suspected of sexually assaulting a 29-year-old Osceola County woman. Troopers during an investigation identified a second victim who claimed to have been sexually assaulted by Foster in Isabella County.

Foster is lodged in Mecosta County Jail on a $250,000 bond.

Authorities are seeking additional charges in Osceola and Isabella counties.

Angie Jackson covers public safety and breaking news for MLive/The Grand Rapids Press. Email her at ajackso3@mlive.com, and follow her on Twitter.